摘要
环形EFP是环形聚能装药爆炸后,在爆轰波和爆炸产物的作用下,环形药型罩挤压翻转,在环形药型罩对称面上,形成沿周向分布的环形爆炸成型侵彻体。它作为一种新概念毁伤元,应用于串联战斗部,可以充分利用其能侵彻大圆孔和装药长径比小的特点,增大随进弹丸口径和装药量,从而提高战斗部的毁伤效能。研究环形EFP形成机理将对串联战斗部的发展有重要的理论意义。
根据环形药型罩的结构特点,提出了环形聚能装药的结构设计方案。建立了环形EFP的成型翻转模型,计算得出内外药型罩微元的径向、轴向速度变化规律。并利用数值仿真对影响环形EFP成型的各因素进行了分析计算,同时还重点对环形药型罩的结构参数进行了正交优化设计。在对环形EFP形成机理研究的基础上,对环形EFP侵彻半无限靶进行了初步研究。
研究表明,经过特殊设计的环形药型罩在爆轰波和爆炸产物的作用下能够形成形态稳定的环形EFP,0.26倍装药长径比时,环形EFP对45~#钢的平均侵彻孔径可达0.96倍装药口径。
Annular EFP is annular explosively formed penetrator in the symmetrical and circumferential direction of the annular liner formed from the annular liner invert caused by the detonation productions act of annular shaped charge. Annular EFP is able to penetration into a target with a big aperture and the length-to-diameter ratio of the annular shaped charge is small. As a new conceptual destroying unit, it will take full advantage of that when it applied to tandem warhead. And the following projectile diameter and charge weight can be increased, so the damage effectiveness of the warhead can be improved. The study on annular EFP has academic significances to the development of tandem warhead.
The structural design proposal of annular shaped charge is proposed according to the annular liner. Molding and inverting process of the annular EFP is established. The Laws of velocity change of inner and outer walls of liner are obtained with calculation. And various factors which have influence on molding process of the annular EFP are also investigated using digital simulation technique. Meanwhile Orthogonal Optimization Design is used to optimize structure parameters of the annular liner. Based on analyzing the formation mechanism of annular EFP, the simulation analysis of annular EFP attacking the 45~# steel target is carried out.
The results show that the specifically designed annular liner is able to formed annular EFP with the detonation productions act of annular shaped charge. And based on the length-to-diameter ratio of the annular shaped charge is 0.26 times the size of charge's diameter, annular EFP penetrating 45~# steel target forms a hole of 0.96 times the size of charge's diameter.
引文
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